package com.lamda.zhekou.utils.excel;

import java.io.OutputStream;
import java.util.List;
import javax.servlet.http.HttpServletResponse;

import java.lang.reflect.Field;

import jxl.Workbook;
import jxl.format.Alignment;
import jxl.format.Border;
import jxl.format.BorderLineStyle;
import jxl.format.VerticalAlignment;
import jxl.write.*;

/***
 * @author lsf
 */
public class ExportExcel {
    /***************************************************************************
     * @param fileName    EXCEL文件名称
     * @return
     */
    public final static String exportExcel(HttpServletResponse response, String fileName, ExcelData excelData1, ExcelData excelData2) {
        String result = "系统提示：Excel文件导出成功！";
        // 以下开始输出到EXCEL
        try {
            //定义输出流，以便打开保存对话框______________________begin

            OutputStream os = response.getOutputStream();// 取得输出流
            response.reset();// 清空输出流
            response.setHeader("Content-disposition", "attachment; filename=" + new String(fileName.getBytes("GB2312"), "ISO8859-1"));
// 设定输出文件头      
            response.setContentType("application/msexcel");// 定义输出类型
            //定义输出流，以便打开保存对话框_______________________end

            /** **********创建工作簿************ */
            WritableWorkbook workbook = Workbook.createWorkbook(os);

            /** **********创建工作表************ */

            createSheet(excelData2.getSheetName(), excelData2.getTittles(), excelData2.getDataList(), workbook);
            createSheet(excelData1.getSheetName(), excelData1.getTittles(), excelData1.getDataList(), workbook);


            /** **********将以上缓存中的内容写到EXCEL文件中******** */
            workbook.write();
            /** *********关闭文件************* */
            workbook.close();

        } catch (Exception e) {
            result = "系统提示：Excel文件导出失败，原因：" + e.toString();
            System.out.println(result);
            e.printStackTrace();
        }
        return result;
    }

    private static void createSheet(String sheetName, List<String> titles, List<Object> listContent, WritableWorkbook workbook) throws WriteException, IllegalAccessException {
        WritableSheet sheet = workbook.createSheet(sheetName, 0);

        /** **********设置纵横打印（默认为纵打）、打印纸***************** */
        jxl.SheetSettings sheetset = sheet.getSettings();
        sheetset.setProtected(false);


        /** ************设置单元格字体************** */
        WritableFont NormalFont = new WritableFont(WritableFont.ARIAL, 10);
        WritableFont BoldFont = new WritableFont(WritableFont.ARIAL, 10, WritableFont.BOLD);

        /** ************以下设置三种单元格样式，灵活备用************ */
        // 用于标题居中
        WritableCellFormat wcf_center = new WritableCellFormat(BoldFont);
        wcf_center.setBorder(Border.ALL, BorderLineStyle.THIN); // 线条
        wcf_center.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
        wcf_center.setAlignment(Alignment.CENTRE); // 文字水平对齐
        wcf_center.setWrap(false); // 文字是否换行

        // 用于正文居左
        WritableCellFormat wcf_left = new WritableCellFormat(NormalFont);
        wcf_left.setBorder(Border.NONE, BorderLineStyle.THIN); // 线条
        wcf_left.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
        wcf_left.setAlignment(Alignment.LEFT); // 文字水平对齐
        wcf_left.setWrap(false); // 文字是否换行


        /** ***************以下是EXCEL开头大标题，暂时省略********************* */
        //sheet.mergeCells(0, 0, colWidth, 0);
        //sheet.addCell(new Label(0, 0, "XX报表", wcf_center));
        /** ***************以下是EXCEL第一行列标题********************* */
        for (int i = 0; i < titles.size(); i++) {
            sheet.addCell(new Label(i, 0, titles.get(i), wcf_center));
        }
        /** ***************以下是EXCEL正文数据********************* */
        Field[] fields = null;
        int i = 1;
        for (Object obj : listContent) {
            fields = obj.getClass().getDeclaredFields();
            int j = 0;
            for (Field v : fields) {
                v.setAccessible(true);
                Object va = v.get(obj);
                if (va == null) {
                    va = "";
                }
                sheet.addCell(new Label(j, i, va.toString(), wcf_left));
                j++;
            }
            i++;
        }
    }



}